Rakesh Kr Singh

Rakesh Kr Singh
Aryabhatta Knowledge University, Patna · Aryabhatta Centre for Nanoscience & Nanotechnology ,

Ph.D. ,Post- Doc
All details activities can be seen on link-www.drrakeshsingh.com

About

157
Publications
35,575
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701
Citations
Additional affiliations
April 2014 - November 2017
Aryabhatta Knowledge University, Patna
Position
  • Professor (Assistant)
September 2013 - present
Patna Women’s College, Patna University( August 2004-2013)
Position
  • Professor (Assistant)
Description
  • Present position-University Centre for Nanoscience & Nanotechnology Aryabhatta Knowledge University Patna,
Education
August 2004 - August 2013
Patna Women’s College
Field of study
  • Magnetic Nanomaterials, Physics Education, Nanomedicine, Food Nanomaterials, Nanosilica from Rice husk, Purification of impurities from water through nanomaterials, Learning Physics through low cost experiment and some reltaed work

Publications

Publications (157)
Research
Arsenic (As) is a ubiquitous carcinogen element, occurring due to geogenic and anthropogenic actions and posing major global public health concerns. This review work significantly summarized the current state of knowledge for arsenic-contaminated water treatment. Firstly, this paper insight a brief understanding of arsenic speciation, toxicity, and...
Article
The superfine powder of black pepper at nanometeric scale was synthesized using High Energy Ball Milling equipment. Current research study shows alteration in crystal structure and surface morphology due to grinding at different milling time. The Electron microscopy studies revealed that the superfine Nano powder is less than 50 nm in size and surf...
Article
Quantum dot cadmium sulphide nanomaterials synthesized in a green chemical way using aqueous solutions of hydrated cadmium sulfate, sodium sulphide and EDTA-disodium salt and thermolysis at a temperature of 170°C, is reported. XRD spectrum confirmed a cubic unit cell of lattice parameter 0.594 nm. A Williamson-Hall plot was used to get micro strain...
Article
Modern scientific approaches have been employed to explore the environment-friendly nature of ayur-vedic khasis bhasma. The average crystallite size and the grain size of bhasma powder are in the nanome-ter range. The average crystallite size increases with the increase in temperature. Energy-dispersive X-ray spectroscopy (EDS) analysis shows that...
Article
Full-text available
This research reports an investigation on the efect of Ag+ substitution in MgFe2O4 nanomaterials. The Ag+-substituted MgFe2O4 nanomaterials were successfully prepared by a citrate precursor method at 550 °C for 2 h. The TG–DTA confrmed the annealing temperature beyond 400 °C to get crystalline phase. The XRD analysis revealed the formation of pure...
Article
In recent years, the popularity of spinel ferrite nanomaterials has increased due to their widespread applications in the electronics industry, energy storage and environmental monitoring. In the present research, the Yttrium�substituted CoYxFe2-xO4 nanomaterials (x = 0.0, 0.1, 0.2 and 0.3) were synthesized between 400 and 750 ◦C by a sol-gel pro...
Article
Full-text available
The rare earth element Pr³⁺ substituted nickel ferrite magnetic nanomaterials NiPrxFe2−xO4 (x = 0, 0.01, 0.02 and 0.03) have been synthesized by a sol–gel method at an annealing temperature of 550°C.The effect of Praseodymium ion on structural, optical, magnetic and ferroelectric properties are being investigated. The structural analysis showed tha...
Article
he small-size amorphous nanoscale silica materials from rice husk were prepared using low-cost ecofriendly approach at temperature 400 °C, 500 °C, and 600 °C. Structural properties of prepared silica materials that were determined using XRD, HR-TEM, and SEM. HR-TEM measurement shows size of about 8 nm. Broad XRD peak zone was obtained at near 2θ =...
Article
Full-text available
Fluoride is widely found in soil-water systems due to anthropogenic and geogenic activities that affect millions worldwide. Fluoride ingestion results in chronic and acute toxicity, including skeletal and dental fluorosis, neurological damage, and bone softening in humans. Therefore, this review paper summarizes biological processes for fluoride re...
Article
Abstract. Jalkhumbhi Bhasma as Nanomaterials is prepared using ecofriendly green approach in Pushya nakshtra and Rohini nakshtra. The crystal structure was evaluated, using modern scientific tools. X-ray diffaraction measurement shows that crystalline size and lattice constant of Jalkhumbhi bhasma prepared in Push and Rohini nakshtra were found,...
Article
The rare earth element praseodymium (Pr)-substituted Li/Ni ferrite nanomaterial, Li0.5Ni0.5PrxFe2−xO4 (x = 0, 0.01, 0.02, 0.03) has been prepared using cost-effective citrate precursor method. The ferrite magnetic materials are iron-oxide-based materials and at nanometric scale very promising for its multifunctional applications in electronics indu...
Article
Full-text available
The impact of Gd rare earth ion on structural, magnetic, and optical properties of Ni and Co spinel ferrite nanomaterial prepared by low-cost sol–gel method has been studied in this research. The XRD measurement confirms the pure phase formation having crystallite size between 15.61–23.49 and 12.01–30.95 nm for Gd³⁺substituted CoFe2O4 and NiFe2O4,...
Article
Full-text available
In this research, we present structural, photo-luminescence and magnetic properties of the Yttrium Aluminum Borate (YAB) nanomaterial, synthesized by low-cost Sol-gel method in high temperature range. X-ray diffraction (XRD) analysis, shows that crystal structure of YAB is of nanometric size ranging between 38 nm to 47 nm for the annealing temperat...
Article
In this paper, we present synthesis, structural optical, and magnetic analysis, of the Yttrium Aluminium Borate (YAB) nanomaterials. YAB materials were synthesized by the Sol-gel method. The structural analysis, carried out by using X-ray diffraction (XRD) and shows that the crystal structure of YAB is of nanometric size ranging between 16 nm and 2...
Article
Full-text available
Spinel cobalt ferrite (CoFe2O4) has been prepared using the citrate precursor sol–gel method. The synthesized samples have been controlled annealing at 550 °C, 650 °C, 750 °C, 850 °C, and 950 °C for 2 h. The XRD pattern reveals about pure phase synthesis of samples with the spinel crystal symmetry (Fd3m space group). The Williamson–Hall (W–H) plot...
Article
Full-text available
The rare earth element Cerium substituted Strontium hexaferrite SrFe12-xCexO19(x = 0.0–0.60), prepared using cost-effective sol–gel a citrate precursor auto-combustion technique at annealing temperature 850 °C. Systematic decrease in crystalline size (79.64–66.02 nm), strain, and systematic increase in cell volume with an increase in the compositio...
Article
In the current investigation, we report successful synthesis of well-crystalline Cd-doped ZnO nanostructures above their miscibility range (Zn1−xCdxO, x = 0.1, 0.2, 0.3, and 0.4) via an easy and simple low-temperature solution method. The as-prepared samples were studied for their structural, optical and electrical behaviour as a function of Cd dop...
Article
Full-text available
Rare earth element Ce³⁺ substituted spinel cobalt ferrite, CoFe2-xCexO4 for (x = 0.0, 0.05, 0.10, 0.15, 0.20) is synthesized using an economical sol–gel technique. The X-ray diffraction analysis reveals that all samples have spinel symmetry indexed to Fd3m space group. Fullprof Rietveld analysis is performed to find out lattice parameters that incr...
Article
We have investigated the structural, optical and magnetic properties of Zn0.90Co0.10O, synthesized by the method of two electrode electrodeposition. X-ray diffraction measurement confirms the evolution of a single-phase polycrystalline hcp Wurtzite structure. Co-2p core-level XPS confirms that Co is present in mixed 2+ and 3+ states. The Fourier Tr...
Article
Full-text available
The pure phase of CoFe 2 O 4 nanomaterials was successfully synthesized by citrate precursor method at an annealing temperature of 500°C. The prepared material was further characterized by XRD, FTIR spec-troscopy, PL spectroscopy, Uv-Vis spectroscopy, SEM and precision multiferroic system. The cubic phase formation with a crystallite size of approx...
Article
Full-text available
The high purity ZnFe 2 O 4 nanomaterials were successfully synthesized by the sol-gel method at an annealing temperature of 900°C. XRD, FTIR, PL, SEM, VSM and multiferroic analyses were performed to characterize the ZnFe 2 O 4 nanomaterial. XRD examined the cubic spinel phase formation with a crys-tallite size of approximately 48 nm. The molecular...
Article
Full-text available
The high purity crystalline CoFe2O4 nanomaterials were prepared by a sol–gel derived facile route at 800 °C for 3 hrs. XRD, SEM, FTIR spectroscopy, PL analysis, Uv–Visible spectroscopy, VSM and precision multiferroic system were used for characterizations of the material. XRD identified the development of the cubic phase with a crystallite size of...
Article
Full-text available
The high purity crystalline CoFe 2 O 4 nanomaterials were prepared by a sol-gel derived facile route at 800°C for 3 hrs. XRD, SEM, FTIR spectroscopy, PL analysis, Uv-Visible spectroscopy, VSM and precision multiferroic system were used for characterizations of the material. XRD identified the development of the cubic phase with a crystallite size o...
Article
Full-text available
The objective of the present research is to explore the Physical properties of a marine origin of Indian Ayurvedic medicine (Shankh Bhasma) as nanomaterials for its applications. Shankh Bhasma has been prepared by using the method as mentioned in Ayurvedic text which includes aloe-vera and buttermilk as ingredient. The preparation method was ecofri...
Article
Full-text available
The high purity ZnFe 2 O 4 nanomaterials were successfully synthesized by the sol-gel method at an annealing temperature of 900°C. XRD, FTIR, PL, SEM, VSM and multiferroic analyses were performed to characterize the ZnFe 2 O 4 nanomaterial. XRD examined the cubic spinel phase formation with a crys-tallite size of approximately 48 nm. The molecular...
Article
Full-text available
An economical and citrate precursor based sol-gel technique is employed for pure phase synthesis of Gd3+ substituted M-type strontium hexaferrite (SrFe12-xGdxO19) for x = (0.25 - 1.00). The XRD patterns reflected all prominent planes related to hexagonal symmetry (P63/mmc space group). The crystallite size and induced strains is determined using Wi...
Article
Full-text available
The pure phase of CoFe 2 O 4 nanomaterials was successfully synthesized by citrate precursor method at an annealing temperature of 500°C. The prepared material was further characterized by XRD, FTIR spec-troscopy, PL spectroscopy, Uv-Vis spectroscopy, SEM and precision multiferroic system. The cubic phase formation with a crystallite size of approx...
Article
Full-text available
Strontium hexaferrite (MÀtype) nanoceramic is synthesized using citrate precursor sol-gel process. The Intensity of the X-ray diffraction pattern confirms that the prepared nanomaterial i.e. SrFe 12 O 19 is in pure phase along with the presence of some impurity at annealing temperature 850°C, which got eliminated by enhancement of 950°C annealing t...
Article
Full-text available
Strontium hexaferrite (M−type) nanoceramic is synthesized using citrate precursor sol–gel process. The Intensity of the X-ray diffraction pattern confirms that the prepared nanomaterial i.e. SrFe12O19 is in pure phase along with the presence of some impurity at annealing temperature 850 °C, which got eliminated by enhancement of 950 °C annealing te...
Article
Full-text available
Application of Food material for medicinal use is become a common and safe approach to treat various diseases. Although Nanoscience is seeming to most promising area to be explore at every aspect of existing science including medicine and pharmaceuticals. Medicinal properties and application of various spices are well explored science but their nan...
Article
Full-text available
The present research explores the structural, magnetic, and optical properties of Pr substituted Li–Ni ferrite, Li0.5Ni0.5PrxFe2−xO4 (where x = 0.01, 0.02, and 0.03) by low-cost citrate precursor method. The effect of Pr on physical, morphological, optical, multiferroic, and magnetic properties on Li–Ni ferrites are studied. Thermal analysis shows...
Article
Full-text available
Non-stoichiometric ferrite magnetic nanoparticles Mg0.5+xLi1−2xFe2O4 (x = 0, 0.15, 0.35) were prepared using low-cost sol–gel method and annealed at temperature 700 °C. Thermal analysis measurement confirms that there is a decrease in weight with an increase in temperature which becomes thermally stable till 600 °C. The XRD study confirms that prep...
Article
Full-text available
Application of Food material for medicinal use is become a common and safe approach to treat various diseases. Although Nanoscience is seeming to most promising area to be explore at every aspect of existing science including medicine and pharmaceuticals. Medicinal properties and application of various spices are well explored science but their nan...
Article
Full-text available
Lithium substituted nickel ferrite nanoparticles, LixNi1-xFe2O4 (x = 0 and 0.5) synthesized using citrate precursor method at a low annealing temperature of 550 °C. The effect of Lithium on structural, morphology, magnetic and optical properties of nanoparticles has been studied. X-ray diffraction measurements show the formation of cubic spinal cry...
Conference Paper
Full-text available
Biomedical applications of Barium hexa Ferrite Nanomaterials
Conference Paper
Full-text available
Low temperature synthesis of Nickel Ferrite nanomaterials and its Magnetic properties
Research
Non-molar Li substituted ferrite nanoparticles Mg0. 5+xLi1−2xFe2O4 (x= 0, 0.15, 0.35) was prepared using low cost sol gel method, annealed at low temperature 450°C. Thermal analysis measurement confirms that there is a decrease in weight with an increase in temperature. The XRD study confirms that pure phase spinel structure and crystalline sizes 2...
Conference Paper
Non-molar Li substituted ferrite nanoparticles Mg0. 5+xLi1−2xFe2O4 (x= 0, 0.15, 0.35) was prepared using low cost sol gel method, annealed at low temperature 450°C. Thermal analysis measurement confirms that there is a decrease in weight with an increase in temperature. The XRD study confirms that pure phase spinel structure and crystalline sizes 2...
Article
M- Type hexagonal ferrites BaFe12-xSmxO19 with (x = 0.0, 0.25, 0.50, 0.75, 1.0) is prepared using citrate precursor based sol–gel method. The X-ray diffraction pattern confirms phase purity of the samples. All samples possessed hexagonal crystal symmetry belonging to P63/mmc space group. The Williamson-Hall plot is utilized for calculating crystall...
Article
Amorphous nanosilica (SiO 2) was prepared from rice husk by a cost-effective and environment-friendly method. Magnetic nanocomposite has been prepared by using injection molding equipment from amorphous nanosilica, ferrites, and PVDF. The XRD pattern analysis reveals the amorphous nature of the silica. The particle size of SiO 2 was observed from t...
Article
The synthesis of nickel potasium ferrite (Ni0·8K0·2Fe2O4) nanoparticles with the doping of Monovalent K¹⁺ ions has been synthesized by sol-gel auto combustion method. Differential Thermal Analysis (DTA) was performed to analyze the phase formation of the prepared sample. The crystal phase formation has been confirmed by employing the XRD (X-ray dif...
Article
Full-text available
Bhasma is a calcined form of traditional biomaterials as nanomedicine, which are produced by treating with herbal juices and by different cycles of heat treatment. Bhasma are being used in the treatment of various diseases in the Indian subcontinent since 1000 years ago. In this present research, Calcium based Indian origin Ayurvedic medicine, Kukk...
Article
Full-text available
Regardless of high industrial and scientific interest in the crystal structure, a thorough study of surface science and their biomedical action of superfine food powder is not very much visible. While food powders are a natural product, being used as spices, as medicines in pharmaceutical and environmental sectors at a large scale. The superfine gi...
Research
Zn0.90Ni0.10O nanoparticles have been synthesized by single bath two electrode electrodeposition at constant voltage. X-ray diffraction, U-V Vis and Photoluminescence studies reveal that a single-phase polycrystalline hcp wurtzite crystal structure of ZnO has evolved. The material consists of a large number of defects like oxygen vacancy (Ov) and Z...
Research
M-type Strontium Hexaferrite (SrFe12O19) is prepared using citrate precursor sol-gel method. The X-ray spectrum confirms that synthesized nanomaterials were in a pure phase with the hexagonal crystal symmetry with P63/mmc space group. The Williamson-Hall plot is utilized for calculating crystallite size and lattice strain in hexaferrite nanomateria...
Article
Full-text available
Removal of fluoride is a desalination technology in which fluoride ions from aqueous solution are adsorbed on suitable adsorbent surfaces. In this study, adsorption potential was performed on both activated alumina (AA) and grinded activated alumina (GAA) by batch experiments for different contact time, pH, fluoride concentration, and adsorbent dos...
Article
Lead iron niobate (PFN) is a promising type-I multiferroic material. It is recognized for its use in integrated magnetoelectric energy conversion. The preparation of the single crystal symmetry phase of PFN is difficult, and its magnetic and ferroelectric properties are still under study. PFN with different iron concentrations, i.e., PbNb1−xFexO3 w...
Article
Full-text available
In the present research article, structural, optical, and magnetic properties along with Curie temperature of lithium substituted magnesium ferrite nanoparticles, Mg0.5+xLi1−2xFe2O4 (0 ≤ x ≤ 0.35) have been reported. The nanomaterial was prepared successfully using chemical-based citrate precursor sol–gel method and annealed at 550 °C. The X-ray di...
Article
Full-text available
A set of Ni0.5Zn0.5Fe2O4 samples were prepared by citrate precursor route to investigate the growth mechanism and its effect on cationic distribution. Following the information from DTA–TGA analysis, samples were annealed at 550 C, 700 C and 750 C. Magnetization and Mössbauer studies suggest that initially the cationic distribution deviates from it...
Article
Full-text available
Nanocrystalline Gd-doped soft Mn–Zn spinel ferrites with a generic formula Mn0.5Zn0.5Fe2−xGdxO4 (x = 0.00, 0.04, 0.08 and 0.12) were synthesized using standard chemical co-precipitation technique. The powder X-ray diffractograms confirmed the phase purity of all the prepared samples along with average crystallite sizes in the range of 3 ± 1 nm. All...
Article
The (Nd³⁺) substituted M-type Barium hexaferrite (BaFe12-x NdxO19) with (Nd³⁺) concentration (x = 0, 0.25, 0.50, 0.75, 1.00) is prepared using citrate precursor based sol gel process. The X-ray intensity pattern confirms that synthesized nanomaterials were in the pure phase and they possess hexagonal crystal structure having P63/mmc space group. Cr...
Article
Full-text available
The influence of doping different rare earth ions (Gd³⁺, Sm³⁺, and Eu³⁺) on the structural, optical, and magnetic properties of Ni–Co spinel ferrite nanoparticles synthesized via chemical co-precipitation method was investigated. The formation of pure cubic spinel phase along with complete solubility of large-sized rare earth ions inside the crysta...
Article
In the present work thrust has been given to understand different properties of Co-doped ZnO nanopowders. Pure ZnO and Co doped ZnO semiconductor nanopowders (Zn1−xCoxO, x = 0.01, 0.02, 0.03 and 0.04) were synthesized by using solution method. The X-ray diffraction revealed the formation of single crystalline phase and also indicated successful inc...
Article
A methodical study on structural, magnetic and optical properties of Eu doped NiFe2O4 nanoparticles with generic composition NiEuxFe2-xO4 (x = 0.00, 0.02, 0.04 and 0.06), synthesized via coprecipitation technique has been reported in this article. The fabrication of single phase ferrite nanoparticles was verified using X-ray powder diffractograms....